WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.

Heat coming: Mercury headed for 90° Friday

|

Sizzling weather, absent here in the more than two weeks since the Memorial Day weekend, is on the way. Chicago’s first 90° high since May 29 seems a good bet as early as Friday afternoon. Until then, area residents can continue to monitor the impending heat in comfort. Humidities are still low—though a few t-storms may flare along a band of converging winds Wednesday afternoon—primarily west of the city.
With the coolest set of June 9-12 daytime readings at Midway Airport since 1928 now on the books, the impending shift to hot weather should be very noticeable. Higher humidities in combination with 90° highs, threaten to push afternoon heat indexes to within striking distance of 100° this weekend.
Record heat south of Chicago Tuesday offers a preview of what’s on the way. The 100° high at Houston, Texas’ Intercontinental Airport marked the earliest appearance of a triple digit reading there since 1900.
-Tom Skilling